Control apparatus having overtravel means

Machine element or mechanism – Mechanical movements – Reciprocating to or from oscillating

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Details

74107, 74470, 92 131, 92 135, 92 137, 92129, F15B 1524, F16H 2144, F16J 110

Patent

active

039837602

ABSTRACT:
A lever mechanism having an output end and an input end wherein the input end is pivotally mounted to a fixed support and provided with a track portion. The track portion has a spaced apart relationship to the pivot axis of the lever and is provided with a generally V-shaped portion and lateral side portions oppositely extending therefrom. A reference force is applied through a roller member which is positioned along the track by a variable input position signal applied thereto. The apex of the V-shaped portion is on a line through the pivot axis such that with the roller member held in a bottomed position and engaging both sides of the V-shaped portion there is no input moment applied to the lever mechanism and movement of the roller member in either direction from a null position produces a clockwise or counterclockwise motion of the output end of the lever mechanism, depending upon the direction of movement of the output end in response to the roller movement. Engagement of the output end with one of the stops prevents further motion of the lever mechanism and permits the roller member to ride up the corresponding inclined side of the V-shaped portion and along the lateral side portion extending therefrom against the resistance of the reference force thereby allowing overtravel of the roller member in response to the input position signal.

REFERENCES:
patent: 1518634 (1924-12-01), Cason, Jr.
patent: 1625457 (1927-04-01), Dapron
patent: 2814310 (1957-11-01), Lower
patent: 2893752 (1959-07-01), May
patent: 3252303 (1966-05-01), Weasler et al.
patent: 3793925 (1974-02-01), Collin
patent: 3905241 (1975-09-01), Downing et al.

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